Did you try different lot #s? It seems strange that the 2 cci's are different. Did they use 2 different cup sizes on purpose or just a difference in batch #s?
jjvw,
Actually the CCI's were virtually identical, the highs were both 0.3000", the lows were both 0.2960". The average was only 0.0004" different (0.2985" for the Standard, 0.2989" for the Magnum), probably due to one or two random primers of the ten being on the longer side.
In manufacturing, each one of these primers would be like snowflakes, no two are exactly alike. Of course this is not obvious to the naked eye, but under magnification some things will stand out. Measurements are a way to keep things in check. Also when setting up a new run (Lot #), you have different materials, thickness, hardness, etc,. There are also several other factors when running production, such as actual set-up, die condition, lube, temperature, humidity, handling, and of course assembly.
If you can read the fine print on the bottom, it basiclly says that another 10 random primers from the same box can give you a different result. Use as a reference only.